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Unify context propagation #231

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Merged
merged 1 commit into from
Jun 26, 2025
Merged

Unify context propagation #231

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22 changes: 10 additions & 12 deletions ddprof-lib/src/main/java/com/datadoghq/profiler/JavaProfiler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,11 +35,9 @@
*/
public final class JavaProfiler {
static final Unsafe UNSAFE;
static final boolean isJDK8;
static {
Unsafe unsafe = null;
String version = System.getProperty("java.version");
isJDK8 = version.startsWith("1.8");
try {
Field f = Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
Expand Down Expand Up @@ -129,7 +127,7 @@ private void initializeContextStorage() {
if (this.contextStorage == null) {
int maxPages = getMaxContextPages0();
if (maxPages > 0) {
if (isJDK8) {
if (UNSAFE != null) {
contextBaseOffsets = new long[maxPages];
// be sure to choose an illegal address as a sentinel value
Arrays.fill(contextBaseOffsets, Long.MIN_VALUE);
Expand Down Expand Up @@ -238,14 +236,14 @@ public void removeThread() {
*/
public void setContext(long spanId, long rootSpanId) {
int tid = TID.get();
if (isJDK8) {
setContextJDK8(tid, spanId, rootSpanId);
if (UNSAFE != null) {
setContextUnsafe(tid, spanId, rootSpanId);
} else {
setContextByteBuffer(tid, spanId, rootSpanId);
}
}

private void setContextJDK8(int tid, long spanId, long rootSpanId) {
private void setContextUnsafe(int tid, long spanId, long rootSpanId) {
if (contextBaseOffsets == null) {
return;
}
Expand Down Expand Up @@ -313,14 +311,14 @@ public void clearContext() {
*/
public void setContextValue(int offset, int value) {
int tid = TID.get();
if (isJDK8) {
setContextJDK8(tid, offset, value);
if (UNSAFE != null) {
setContextUnsafe(tid, offset, value);
} else {
setContextByteBuffer(tid, offset, value);
}
}

private void setContextJDK8(int tid, int offset, int value) {
private void setContextUnsafe(int tid, int offset, int value) {
if (contextBaseOffsets == null) {
return;
}
Expand All @@ -344,14 +342,14 @@ public void setContextByteBuffer(int tid, int offset, int value) {

void copyTags(int[] snapshot) {
int tid = TID.get();
if (isJDK8) {
copyTagsJDK8(tid, snapshot);
if (UNSAFE != null) {
copyTagsUnsafe(tid, snapshot);
} else {
copyTagsByteBuffer(tid, snapshot);
}
}

void copyTagsJDK8(int tid, int[] snapshot) {
void copyTagsUnsafe(int tid, int[] snapshot) {
if (contextBaseOffsets == null) {
return;
}
Expand Down
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